Hooks
This category contains the available hooks that are available to developers within Gravity SMTP in order to extend its functionality.
Standard Constants
Reference documentation for the CONSTANTS that are provided with the plugin but are not related to any specific integration.
Getting Started
Brevo
This section contains all articles specifically related to integrating your Gravity SMTP setup with the Brevo mail sending service.
Constants
This category contains a list of the constants that can be set within the wp-config.php file of your WordPress installation.
User Guides
Google / Gmail
This section contains all articles specifically related to integrating your Gravity SMTP setup with the Google / Gmail to send transactional emails.
Integrations
Mailgun
This section contains all articles specifically related to integrating your Gravity SMTP setup with the Sinch Mailgun mail sending service.
Developer
This category contains documentation related to developer-specific use cases of the Gravity SMTP plugin. The items contained here are not required for normal operation of Gravity SMTP.
Microsoft 365 / Outlook
This category includes documentation related to integrating Gravity SMTP with a Microsoft 365 account outgoing email service.
Postmark
This section contains all articles specifically related to integrating your Gravity SMTP setup with the Active Campaign's Postmark mail sending service.
SendGrid
This section contains all articles specifically related to integrating your Gravity SMTP setup with the Twilio Sendgrid mail sending service.
Articles
GRAVITYSMTP_DEBUG_LOG_RETENTION
The GRAVITYSMTP_DEBUG_LOG_RETENTION constant in Gravity SMTP defines the number of days to retain logs.
GRAVITYSMTP_DEBUG_LOG_ENABLED
The GRAVITYSMTP_DEBUG_LOG_ENABLED constant in Gravity SMTP enables or disables the email log.
Gravity SMTP Capabilities
List of capabilities that Gravity SMTP introduces to the WordPress role system.
Google Constants
Constants available for the Gravity SMTP Google Integration.
Connecting to Google / Gmail
This article describes the process of integrating Gravity SMTP on your website using Google’s API to ensure secure authentication for your site’s emails.
SendGrid Constants
Constants available for the SendGrid Integration.
Custom SMTP Constants
Constants available for the Custom SMTP integration.
Postmark Constants
Constants available for the Postmark Integration.
Brevo Constants
Constants available for the Postmark Integration.
Mailgun Constants
Constants available for the Mailgun Integration.